Have jni_generator.gypi specify include_dirs to dependent targets.

Rather than each dependent target of a target that generates jni headers having
to specify the appropriate include_dir manually, jni_generator.gypi can do it
via direct_dependent_settings.

TBR=darin@chromium.org

Review URL: https://codereview.chromium.org/111493006

git-svn-id: http://src.chromium.org/svn/trunk/src/build@241216 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

jni_generator.gypi

@@ -67,6 +67,11 @@
       ],
     },
   ],
+  'direct_dependent_settings': {
+    'include_dirs': [
+      '<(SHARED_INTERMEDIATE_DIR)/<(jni_gen_package)',
+    ],
+  },
   # This target exports a hard dependency because it generates header
   # files.
   'hard_dependency': 1,